Hydrogen production by co-cultures of Lactobacillus and a photosynthetic bacterium, Rhodobacter sphaeroides RV

Asada, Yasuo; Tokumoto, Masaru; Aihara, Yasuyuki; Oku, Masayo; Ishimi, Katsuhiro; Wakayama, Tatsuki; Miyake, Jun; Tomiyama, Masamitsu; Kohno, Hirotada

doi:10.1016/j.ijhydene.2006.06.017

Cited by 129 publications

(30 citation statements)

References 11 publications

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“…Examples include bio-hydrogen production by the photosynthetic non-sulfur bacteria (PNSB) which eventually convert solar energy to usable hydrogen fuels (McKinlay and Harwood 2010 ;Argun and Kargi 2011 ;Basak and Das 2007 ;Yokoi et al 2002 ;Asada et al 2006 ) , application of anaerobic sulfate reduction to remove heavy metal contamination (Muyzer and Stams 2008 ) and anaerobic ammonium oxidation (anammox) to promote the global nitrogen cycle (van der Star et al 2007 ) , as well as the recent exploitation of hypoxia targeted bacterial strains Salmonella , Clostridium , and Bi fi dobacterium for cancer treatment (Arrach et al 2008 ;Forbes 2010 ;Ryan et al 2009 ) . While designing and manipulation of these systems must ful fi ll the fundamental principles of energy and redox homeostasis of bacterial physiology, optimizing various environmental, process, and strain based factors can be explicitly determined by experiments.…”

Section: Discussionmentioning

confidence: 99%

Metabolic Reprogramming Under Microaerobic and Anaerobic Conditions in Bacteria

Shan¹,

Lai²,

Yan³

2012

Subcellular Biochemistry

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Oxygen has a great impact on the metabolism and physiology of microorganisms. It serves as the most efficient terminal electron acceptor to drive the energy conservation process of cellular respiration and is required in many biosynthetic reactions. Bacteria encounter oxygen fluctuation and limitation during their growth in both natural ecological niches and in laboratory vessels. In response to oxygen limitation, facultative bacteria undergo substantial metabolic reprogramming to switch from the aerobic respiration to either anaerobic respiration, fermentation, or photosynthesis. Two key factors determine the metabolic pathways bacteria adopt under oxygen deprived microaerobic and anaerobic conditions: maximal energy conservation and redox homeostasis. In this chapter, we first describe how the fulfillment of these two key factors governs the metabolic reprogramming of facultative bacteria and how the process is tightly controlled by several global regulatory factors: FNR, ArcBA, as well as NarL and NarP. We then utilizes fermentation of glycerol, a large surplus byproduct of biodiesel industry, as an example to illustrate how environment, process, and strain based approaches can be exploited to manipulate and engineer the anaerobic metabolic pathways so that desirable fermentation products can be achieved with optimal yield.

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Section: Discussionmentioning

confidence: 99%

Metabolic Reprogramming Under Microaerobic and Anaerobic Conditions in Bacteria

Shan¹,

Lai²,

Yan³

2012

Subcellular Biochemistry

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“…However, this calculation was based on a H 2 yield of 1.3 mol H 2 /mol hexose from a single-stage bacterial fermentation. Several authors report multiorganism systems for H 2 production producing in excess of 7 mol H 2 /mol hexose (Weetall et al 1989;Miura et al 1992;Ike et al 2001;Kawaguchi et al 2001;Yokoi et al 2001;Asada et al 2006;Kim et al 2006c). Hence, a bio-H 2 process could be more energetically productive than a bio-methane process if dual H 2 -producing systems could be implemented.…”

Section: Bio-h 2 Bio-methane or Bio-ethanol?mentioning

confidence: 99%

Integrating dark and light bio-hydrogen production strategies: towards the hydrogen economy

Redwood

Paterson-Beedle

Macaskie

2008

Rev Environ Sci Biotechnol

138

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Biological methods of hydrogen production are preferable to chemical methods because of the possibility to use sunlight, CO 2 and organic wastes as substrates for environmentally benign conversions, under moderate conditions. By combining different microorganisms with different capabilities, the individual strengths of each may be exploited and their weaknesses overcome. Mechanisms of bio-hydrogen production are described and strategies for their integration are discussed. Dual systems can be divided broadly into wholly light-driven systems (with microalgae/cyanobacteria as the 1 st stage) and partially light-driven systems (with a dark, fermentative initial reaction). Review and evaluation of published data suggests that the latter type of system holds greater promise for industrial application. This is because the calculated land area required for a wholly light-driven dual system would be too large for either centralised (macro-) or decentralised (micro-)energy generation. The potential contribution to the hydrogen economy of partially light-driven dual systems is overviewed alongside that of other bio-fuels such as bio-methane and bio-ethanol.Redwood et al. -Dual systems for Bio-H 2 -Reviews in Environ. Sci. Bio/Technol. 8:149 http://dx

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“…There have been a number of recent reports on two-stage systems as shown in Fig. 4 [26][27][28][29][30][31][32][33]. One study successfully produced hydrogen using olive mill wastewater for the production of biohydrogen in a two-stage process, with a three fold increase in hydrogen production when compared to photo-fermentation alone, and a COD conversion effi ciency of ~55% [29].…”

Section: Microbial Processes Producing Hydrogenmentioning

confidence: 99%

“…There have been several studies in which co-cultures of fermentative and photosynthetic organisms were examined [26,33]. Work with co-cultures of both C. butyricum and R. sphaeroides showed only a slight increase in the hydrogen yield when compared with production obtained from pure cultures separately [26]; even at high Rhodobacter ratios (~6:1) it appeared that R. sphaeroides was not able to compete with Clostridium for substrate (glucose).…”

Section: Microbial Processes Producing Hydrogenmentioning

confidence: 99%

“…were not used as a substrate for photofermentation). A co-immobilized two stage system using Lactobacillus and R. sphaeroides was much more successful with a maximum yield of 7 mol H 2 /mole glucose [33]. However, it remains to be seen if the extra manipulation and costs involved, especially if the system is run in batch mode, can be justifi ed for any practical application.…”

Section: Microbial Processes Producing Hydrogenmentioning

confidence: 99%

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Microbiological and engineering aspects of biohydrogen production

et al. 2009

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Dramatically rising oil prices and increasing awareness of the dire environmental consequences of fossil fuel use, including startling effects of climate change, are refocusing attention worldwide on the search for alternative fuels. Hydrogen is poised to become an important future energy carrier. Renewable hydrogen production is pivotal in making it a truly sustainable replacement for fossil fuels, and for realizing its full potential in reducing greenhouse gas emissions. One attractive option is to produce hydrogen through microbial fermentation. This process would use readily available wastes as well as presently unutilized bioresources, including enormous supplies of agricultural and forestry wastes. These potential energy sources are currently not well exploited, and in addition, pose environmental problems. However, fuels are relatively low value products, placing severe constraints on any production process. Therefore, means must be sought to maximize yields and rates of hydrogen production while at the same time minimizing energy and capital inputs to the bioprocess. Here we review the various attributes of the characterized hydrogen producing bacteria as well as the preparation and properties of mixed microfl ora that have been shown to convert various substrates to hydrogen. Factors affecting yields and rates are highlighted and some avenues for increasing these parameters are explored. On the engineering side, we review the potential waste pre-treatment technologies and discuss the relevant bioprocess parameters, possible reactor confi gurations, including emerging technologies, and how engineering design-directed research might provide insight into the exploitation of the signifi cant energy potential of biomass resources.

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Hydrogen production by co-cultures of Lactobacillus and a photosynthetic bacterium, Rhodobacter sphaeroides RV

Cited by 129 publications

References 11 publications

Metabolic Reprogramming Under Microaerobic and Anaerobic Conditions in Bacteria

Metabolic Reprogramming Under Microaerobic and Anaerobic Conditions in Bacteria

Integrating dark and light bio-hydrogen production strategies: towards the hydrogen economy

Microbiological and engineering aspects of biohydrogen production

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